Snubbed truck



Feb. 28, 1961 BACHMAN ET AL 2,972,967

SNUBBED TRUCK 2 Sheets-Sheet 1 Filed 001;. 11, 1957 INVENTORS.

1961 F. E. BACHMAN ET AL 2,972,967

SNUBBED TRUCK 2 Sheets-Sheet 2 Filed Oct. 11, 1957 INVENTORS.

SNUBBED TRUCK Fred E. Bachman, St. Louis, Mo., and Arthur F. Baker,

Granite City, and Robert B. Cottrell, Belleville, 11]., assignors toAmerican Steel Foundries, Chicago, Ill., a corporation of New JerseyFiled Oct. 11, 1957, Ser. No. 689,633

2 Claims. (Cl. 105-197) Our invention relates to railway car trucks, andmore particularly, to a type of truck wherein friction absorbing meansare associated with the truck bolster in such manner as to damp theoscillations of the bolster supporting spring group.

An object of our invention is to devise an improved form of such a truckwherein the load carrying member or bolster may be resiliently supportedby spaced side frames and novel friction means may be supported by thebolster and which may engage the bolster and side frames so as toeliminate the use of bolster gibs.

A specific object is to provide an arrangement wherein the frictionmeans or friction shoes extend into the columns of the side frames sothat transverse movements of the bolster relative to the side frames arelimited due to engagement of the friction shoes with the column walls ofthe side frames and with the end walls of the shoe pocket of thebolster.

A more specific object is to provide an arrangement wherein the lateralforces exerted on a truck side frame and a truck bolster are transmittedthrough the friction means or friction shoes rather than by directcontact of the side frame and bolster.

A further object is to provide a novel snubbing arrangement wherein thefriction shoe casting extends out of a pocket of the bolster and whichcasting is received within a pocket presented by an adjacent side framecolumn.

A still further object is to provide a novel snubbing arrangement whichutilizes a friction casting comprising a gib and which gib extends intoan opening of the adjacent side frame so that frictional engagementbetween the casting and side frame is afforded by engagement of thesides of the gib with spaced friction surfaces of the side frame.

A still further object is to provide the truck of the class describedwith a friction casting wherein the side frame columns are disposedwithin a channel of the friction casting and frictional engagement isafforded by engagement of the friction surface of the columns with thefriction surfaces of the channel.

The foregoing and other objects and advantages of the invention willbecome apparent from a consideration of the following specification andthe accompanying drawings, wherein:

Figure 1 is a fragmentary top plan view of the preferred embodiment ofthe truck with portions thereof being broken away to more clearlyillustrate the cooperation of parts thereof;

Figure 2 is a fragmentary side elevational view of the truck with one ofthe shoes, one of the side frame columns, and a portion of the bolsterin section;

Figure 3 is a fragmentary plan view of the bolster showing a secondembodiment of the invention, and

.Figure 4 is a fragmentary plan view of the bolster showing a thirdembodiment of the invention.

It should be noted that to achieve clarity, certain structural detailshave been omitted from various views where 2,972,967 latented Feb. 28,1961 ice said details are believed to be adequately shown in otherviews.

Describing the invention in detail and referring first to Figures 1 and2, the truck comprises a side frame 10 comprising a compression member12 and a tension member 14 and spaced side frame columns 16 defining acentral bolster opening 18 and windows 20 adjacent the ends of the frame10 to be adapted for connection in the usual manner to associated wheeland axle assemblies (not shown).

A bolster, generally designated 22, preferably of onepiece castconstruction, is conventionally supported within the bolster opening 18by springs diagrammatically indicated at 24 and which springs aresupported by a spring seat 26 at the bottom of the bolster opening 18.

As will be understood by those skilled in the art, the bolster 22extends transversely of the truck and projects at each end thereof intothe bolster opening 18 of the related side frame. In the drawings, onlyone end of the bolster is shown with the related side frame, and,consequently, 'only one snubbing means is shown as a correspondingstructure at the opposite end of the bolster is preferably identical.

Each side of the bolster comprises a pocket 28 defined in part byinboard and outboard webs 30 and 32, said webs being inwardly offset at34 and 36, respectively, to define a narrowed inner portion of saidpocket, the offset portions 34 and 36 merging with a rear wall 38extending substantially parallel to and longitudinally with thelongitudinal vertical center plane of the bolster 22. Integrally formedwith webs 34 and 36 and rear wall 38 of each pocket 8 may be a top wall40 of bolster 22 and a pair of downwardly extending spaced wedge walls44, said downwardly spaced wedge walls having friction surfaces 45. Thewalls 44 project downwardly so that the lower ends thereof intersect thelongitudinal center plane of the bolster 22. The lower ends of each ofthe walls 44 merge with a vertically upstanding web 46 whichinterconnects and may be integrally formed with walls 44 and a bottomwall 48 of bolster 22.

A pair of preferably identical friction shoes may be positioned withinpockets 28. Each shoe is a casting of generally cup-like form havingfront and rear walls 52 and 54, respectively, spaced inboard andoutboard walls 56 and 57, respectively, and an integral web 58 affordingan internal spring seat as at 60. Wall 56 and 57 may be inwardly offsetat 61 and 63, respectively. The rear wall 54 may be disposed parallel toweb 44 and may have a friction face 62 adapted to frictionally engagefriction surface 45. The front wall 52 may be disposed parallel to thelongitudinal vertical center plane of the bolster 22 and may be providedwith a vertical friction face 64 adapted to frictionally engage a wearplate 65 conventionally secured to the adjacent side frame column 16,and the walls 61 and 63 of the friction shoe 50 may be formed withvertical friction surfaces 66 for complementary engagement againstassociated surfaces 34 and 36 of the pockets 28. The rear wall 54 ofeach shoe may be provided with an offset handle-like portion 68 and theside Walls 34 and 36 of the pocket 28 may be cored away, as-at 7t), inalignment with the rear surface of the handle-like portion 68 in orderto acc0mmodate the reception of an associated tool as hereinafter morefully described.

The bottom edge of the shoe 50 may have an opening 72 for reception of ashoe spring 74 which spring has its upper end seated against spring seat60 and which may be seated at its lower end on a spring seat 76 ofbolster 22.'

Outside of pocket 28 and within a pocket 80 of the adjacent side framecolumn 16 formed by a pair of inboard and outboard gibs 82 and 84secured in any convenient manner to the inboard and outboard sides,respectively, of the side frame column member 16. It may be seen,therefore, that friction face 64 of friction shoe may engage wear plateso as'to frictionally limit upward movement of the bolster 22 relativeto the side frame 10. It may be also seen that inboard and outboardsides 56 and 57 of friction shoe 50 may engage inboard and outboard webs30 and 32, respectively, of shoe 50 and also may engage the inboard andoutboard gibs S2 and 84, respectively, of the side frame column member16 so as to limit transverse movement of the bolster 22 relative to theside frame 10.

A tool (not shown) may be inserted through openings of side walls 30 and32 in engagement with the handlelilre portions 68 of the friction shoe50 whereby said shoe may be drawn into the pockets 28 against theresistance of the spring 74 during assembly and disassembly of thebolster and side frame 16.

A modification of our novel friction shoe, bolster and side frame isshown in Figure 3 wherein the friction shoe, generally designated isdisposed within pocket 28, said pocket 28 being preferably identical tothe friction shoe pocket disclosed in Figures 1 and 2. As a resultthereof, the portion of the friction shoe 9% disposed within pocket 28of Figure 3 is similar to the portion of friction shoe 50 disposedwithin the pocket 28 of Figures 1 and 2. However, a front wall 92 ofshoe 90 comprises a centrally disposed gib or lug 94 extending outsideof the pocket 28 and into a pocket or channel 96 of a related side framecolumn member 97 and which gib 94- may engage inboardly and outboardlyspaced side frame column Wear plates 98 and 100, respectively, securedin the conventional manner to surfaces 102 and 104, respectively, of thecolumn 97.

A second modification or embodiment of our novel friction shoe, bolsterand side frame is shown in Figure 4, wherein the construction of thearrangement is substantially similar to the arrangement disclosed inFigures 1 and 2 except for the fact that instead of the shoe of Figure 4being disposed in a pocket of the side frame 10, side frame columns 112of frame 10 may be disposed within a channel 114 of the related shoe 110and which channel may be formed by gibs 115 and 116 disposed at theinboard and outboard sides, respectively, of the related friction shoe.The friction surface 116 of the shoe 110 may engage a wear plate 118secured to side frame column 112.

It is to be understood that we do not wish to be limited by the exactembodiments of the device shown which are merely by way ofillustrationand not limitation as various and other forms of the device will, ofcourse, be apparent to those skilled in the artwithout departing fromthe spirit of the invention or the scope of the claims.

We claim:

1. In a snubbed truck arrangement, the combination of: a side framehaving a column presenting a vertical friction surface; a bolsterresiliently supported on the side frame and having a pocket facing saidside frame column and presenting in said pocket a wedge surface inclinedtoward the friction surface of said column; a one-piece friction shoedisposed within said pocket and presenting friction and Wedge facesdisposed for engagement with the friction and Wedge surfaces of the sideframe and bolster, respectively; resilient means to urge the shoefriction and wedge faces into engagement with the respective frictionand wedge surfaces, said resilient means being carried in the bolsterpocket for vertical movement therewith; means to prevent lateralmovement of the shoe lengthwise of the bolster; and a pair of integralgibs projecting from the shoe toward opposite sides of the side framecolumn and serving as the only means of limiting longitudinal movementof the bolster relative to the side frame.

2. In a snubbed railway car truck arrangement, the combination of: aside frame memberhaving a vertical column presenting a friction surface;a bolster member having in a side thereof a pocket; a one-piece frictionshoe carried in said pocket and having a friction wall presenting afriction face; spring means to urge said shoe face into engagement withsaid column surface, said spring means being carried in the bolsterpocket for vertical movement therewith; means to restrict lateralmovement of the shoe longitudinally of the bolster; and a pair ofintegral gibs projecting from the shoe friction wall on opposite sidesof the side frame column and serving as thesole means of limitinglongitudinal movement of the bolster transversely of the side frame.

Ramos Mar. 2, 1954 Maatman Feb. 22, 1955

